Wrench.



M. A. SMITH.

' WRENCH.

urmonzox nun mac. 1, 1904. 1

PATENTEDMAY-l6,1905. v I

UNITED STATES Patented May 16, 1905.

PATENT OFFICE.

MARVIN A. SMITH, or HATCHER, ALABAMA.

WRENCH.

SPECIFICATION forming part of Letters Patent ITO. 790,084, dated May 16, 1905.

Application filed December 1,1904 Serial No. 235,057. A

To all whom/it ntajconcerm Be it known that I, MARVIN A. SMITH, acitizen of the United States, residing at Hatcher,

in the county of Dale, State ofAlabama, have invented certain new and useful Im provements in \Vrenches; and I do hereby declare the following to bea full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to wrenches, and more particularly to that class commonly known as monkey-wrenches, the object of theinvention being to provide a wrench wherein .the movable jaw-may be easily and quickly shifted toward and away from the fixed jaw and in which the movable jaw will be held snugly upon the stern of the fixed jaw.

In the drawings, forming a'portion of this specification, and in which like numerals of reference indicate similar parts in the several Views, Figure l is a side elevation showing a wrench embodying the present invention. Fig. 2 is a section taken longitudinally through a Wrench embodying the present invention.

Referring now to the drawings, there is shown a wrench comprising a fixed jaw 5 at the end of a stem 6, upon the opposite end of which is disposed a handle 7, held in place by means of the usual nut 8. The portion of the stem betweenthe handle and the fixed jaw has a rack 9 formed upon one face.

Upon the stem of the wrench between the fixed jaw and the handle is slidably mounted the movable jaw 10, having the guide-loops 11 and 12, that surround the stem and fit it snugly, while permitting the movable jaw to tion, leads to the ratchet-face of the stem of the wrench. Bridging this last-named portion is a spring-plate 13, which is fixed at its upper end, and upon this spring-plate or against it is disposed a helical spring 14. A pawl 15 is pivoted at thelower portion of the boxing, its lower end projecting below the boxing and into position to engage the rack 9, while its upper end rests against the helical spring and has a thumb-piece16. The helical springserves to hold the pawl normally and yieldably with its lower end in engagement with the rack 9, while permitting the pawl to be swung out of engagement with the rack. The spring-plate by pressing against the stem of the wrench holds the sliding jaw against vibration and consequent rattling, the action of the spring-plate being augmented by that of the helical spring. It will be understood that the pawl projects through the bottom of the boxing, which exposes the engaging end of the pawl, so that the condition of the pawl at all times may be observed and may be manipulated other than with the thumb-piece, if necessary.'

What is claimed is A wrench comprising a stem provided with a rack and havingafixed jaw at one end, amovable jaw slidably mounted upon the stem and having a boxing opening toward and away from the stem, a pawl pivoted in the boxing and disposed to engage with one end the rack, aplate in the boxing disposed against the stem and a spring resting against the plate and pawl and adapted to hold the latter yieldably in engagement with the rack.

In testimony whereof I affix my signaturein presence of two witnesses. 1

MARVIN A. SMITH.

VVitnessesr (J. B. POWELL, H. L. FAULK. 

